Link-motion for engines



(No Model.)

C. I...v EBERLB. LINK MOTION PoR ENGINES. l Y No. 416,723. Patented Dec. 10, ,1889.

% ,q I @512| Sito/WJ@ UNITED STATES PATENT OFFICE.

CHRISTIAN L. EBERLE, OF MOUNT JOY, PENNSYLVANIA.

LINK-MOTION FOR ENGINES.

SPECIFICATION forming part of LettersIEatent No. 416,723, dated December 10, 1889.

i Application led May 31, 1889. Serial No. 312,754. (No model.)

a single eccentric.

The improvement consists in the combinationwitha single eccentric and the valve, of a reversing-bar and connections between the eccentric, the reversing-bar, and valve whereby the motion of the latter may be reversed.

In the accompanying drawings neither the cylinder nor the connections of the reversinglever are shown, as they do not affect the working of my invention. t

In the accompanying drawings, Figure l is a side elevation of a link-motion embodying my invention, showing a portion of the steamchest and the valve and valve-seat in section. Fig. 2 is a top or plan view of the same, the steam-chest with its contents being removed. Fig. 3 is a side elevation, partly in section, showing the sliding block in adjustment for the backwardmovement of the engine. Fig. 4: is a vertical transverse section on the line x oc, Fig. 3; and Fig. 5 is a horizontal section on the line y y, Fig. 3, showing the connection between the reversing-bar and link.

Similar letters indicate like parts throughout the several views.

A A represent the frame to which the linkconnection is attached.

O is the driving-axle; a, the eccentric; b, the eccentric-strap, and B the eccentric-rod pivoted to the upper end of the reversing-bar D. The reversing-bar is pivoted to the frame at F, and is provided with vertical tongues d on its edges. A sliding block E is connected with the reversing-bar by means of flanges or jaws e, formed on the edges of its inner face, provided with grooves which engage the tongues d. Projecting from the front of the sliding block there is a pin c, which passes through the slot g of the link G. This pin supports a block H, pivoted thereon, which engages the sides of the slot in the link in grooves h, cut in its edges. The reversinglever is connected with the end of the pin extended beyond the face of the block H for that purpose.

' The link G is straight and is made integral with or rigidly secured at the center of a link-bar I, working in a guide-block K, secured tothe frame A A.. Between the link and the eccentric there is a cut-o lever J, pivoted to the link-bar, which extends upward therefrom and is connected with the valve-rod N, as shown in the iirst three figures. There is a guide-rod Lrigidly fastened to the cut-off lever J, which extends back along the eccentric-rod B, in the end of which there is cut a groove k, that engages slots in a guide-block M, pivoted to the eccentric-rod at m. Y

By the movement of the sliding block E from one side of the pivot F to the other on the reversing-bar the engine is reversed. In Fig. l is shown the position occupied by the sliding block when a forward motion is communicated to the engine 4through said block and the reversing-link, and in Fig. 3 the position occupied by it when the engine is to be moved backward. The cut-off in both instances is also regulated by the movement of the sliding block, increasing or diminishing it by shifting the block between either end of the reversing-bar and its pivot. When forward motion is transmitted to the engine, the eccentric-rod, link and link-bar, cut-off lever, and valve all move simultaneously in the same direction; but when the engine is reversed the link, link-bar, cut-off lever, and valve move in a direction opposite to that of the eccentric-rod. l i

The action of my device is exceedingly simple and effective, and avoids the use of a number of parts necessary when employing double eccentrics.

It is evident that a number of changes in the position and construction of the several parts of my machine might be resorted to without departing from the spirit and scope of my invention, and hence I would have it understood that I do not limit myself to the exact construction shown and described, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

IOO

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with a single eccentric, of a reversing-bar and valve and connections between the eccentric, the reversing-bar, and valve whereby the movement of the latter may be reversed.

2. The combination, witha single eccentric,

of a reversing-bar connected therewith, and' link and adapted to be moved from one side of the pivot of the reversing-bar to the other, and a connection between the link and valve, substantially as speeiied.

5. The combination, with the reversing-bar, of a link rigidly secured to asliding link-bar, a sliding block engaged with the reversingbar and link, and a cut-ott lever connecting the link-bar and valve-rod, substantially as and for the purpose specied.

G. The combination, with the reversing-bar, the sliding block, and the link rigidly secured to the sliding link-bar, of the cut-off lever connecting the link-bar and valve, and a guide-rod rigidly fastened to the cut-off lever and having a reciprocating motion on its connection with the eccentric-rod, substantially as specified.

hi CHRISTIAN s L. EBERLE. mark Witnesses:

GEO. A. LANE, WM. R. GERHART. 

